
Gelcoat is surprisingly thick and - depending how often it may have been deep-polished in the past 20 years or so - you may find that the crazing has not penetrated all the way through to.

As you can see, the spider webbing is much more visible in the photo with flash, but doesn't show up well in the photo without flash. The best bet might be to gently sand the gelcoat, perhaps in a relatively obscure sample area to start with, and see how deeply the crazing has penetrated. Fold the sandpaper so you can get a corner of it into the opened crack. Next, use 80-grit sandpaper to scuff up the opening you created.
#Gelcoat crazing repair full
You will need to go through the gelcoat to the fiberglass and open the full length of the crack. I've posted some photos to show what I'm talking about, but they're not great. Repairing Minor Gelcoat Cracks Use a rotary tool or scraping tool to open the crack into a V shape. I used some Meguiars Ultimate Compound on the top of the boat which has removed most of the oxidation, but the spider webbing remains. The finish looks sort of spider webbed but doesn't appear to extend into the fiberglass and is purely cosmetic. I can't really tell what it is and I haven't been able to find a comparable photo of a boat with similar characteristics.

The gelcoat was chalky and oxidized across the top and there appears to be some minor crazing or something, as well, across the stern. MagicEzy 9 Second Chip Fix - (Navy Blue) - All-in-One Fiberglass Repair Filler for Boats and Fiberglass Gelcoat - Strong Marine Epoxy Putty - Lifetime Durability 25.972597 (5.19/oz) One of these items ships sooner than the other.
#Gelcoat crazing repair pro
I got a really good deal on a 2005 Stratos 275 Pro XL (bass boat) but one of the previous owners must have left the boat uncovered for a significant period of time.

I just purchased my first boat a couple of weeks ago and was hoping I could ask some questions.
